Fix mypy errors on Windows (#12266)

pyproject.toml

@@ -87,6 +87,8 @@ lint = [
     "sphinx-lint",
     "types-docutils",
     "types-requests",
+    "importlib_metadata",  # for mypy (Python<=3.9)
+    "tomli",  # for mypy (Python<=3.10)
     "pytest>=6.0",
 ]
 test = [

sphinx/locale/__init__.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import locale
+import sys
 from gettext import NullTranslations, translation
 from os import path
 from typing import TYPE_CHECKING
@@ -156,13 +157,15 @@ def init_console(
     """
     if locale_dir is None:
         locale_dir = _LOCALE_DIR
-    try:
-        # encoding is ignored
-        language, _ = locale.getlocale(locale.LC_MESSAGES)
-    except AttributeError:
-        # LC_MESSAGES is not always defined. Fallback to the default language
-        # in case it is not.
+    if sys.platform == 'win32':
         language = None
+    else:
+        try:
+            # encoding is ignored
+            language, _ = locale.getlocale(locale.LC_MESSAGES)
+        except AttributeError:
+            # Fallback to the default language in case LC_MESSAGES is not defined.
+            language = None
     return init([locale_dir], language, catalog, 'console')
 
 

sphinx/registry.py

@@ -11,7 +11,7 @@
 if sys.version_info >= (3, 10):
     from importlib.metadata import entry_points
 else:
-    from importlib_metadata import entry_points  # type: ignore[import-not-found]
+    from importlib_metadata import entry_points
 
 from sphinx.domains import Domain, Index, ObjType
 from sphinx.domains.std import GenericObject, Target

sphinx/theming.py

@@ -24,12 +24,12 @@
 if sys.version_info >= (3, 11):
     import tomllib
 else:
-    import tomli as tomllib  # type: ignore[import-not-found]
+    import tomli as tomllib
 
 if sys.version_info >= (3, 10):
     from importlib.metadata import entry_points
 else:
-    from importlib_metadata import entry_points  # type: ignore[import-not-found]
+    from importlib_metadata import entry_points
 
 if TYPE_CHECKING:
     from typing import TypedDict